Note: If you don't include java class name in double quotes the statements will fail.
If these objects are still invalid proceed to next step
3) Find respective modules of java classes:
We need to check as to which module the JAVA CLASS belongs.
To check the module of first invalid run the following statement:
SQL>SELECT dbms_java.longname('/b0993e19_MyAppsContext') FROM dual;
DBMS_JAVA.LONGNAME('/B0993E19_MYAPPSCONTEXT')
oracle/apps/wms/cartonization/server/MyAppsContext

The result of this query shows that this java class is associated with WMS module as it is included in oracle/apps/wms package From the name of second invalid above, FileLog, it is clear that it is associated with FND module as it is included in oracle/apps/fnd package.

4) Find jar file which includes the java class:
Create a shell script, say, whichjar.sh with the following logic:
#!/usr/bin/ksh
for f in `ls $1/java/jar/*.jar`
do
t=`strings $f
grep $2`
if test ! -z "$t"
then
echo "$2 is found in $f"
fi
done

Now run the script with the following command:
$./whichjava.sh <$PRODUCT_TOP>
$./whichjar.sh $WMS_TOP MyAppsContext

MyAppsContext is found in /wms/11.5.0/java/jar/wmscrtzn.jar

$./whichjar.sh $FND_TOP FileLog
FileLog is found in //fnd/11.5.0/java/jar/fndaolj.jar

Note: Before running the script make sure you give execute permissions to script and there are no control or junk characters in the script.

5) Load jar file into database:
Change directory to [8.1.7 ORACLE_HOME]\bin and run the following command:
$loadjava -force -verbose -resolve \
-user apps/@ $WMS_TOP/java/jar/wmscrtzn.jar
$loadjava -force -resolve \
-user apps/@ $FND_TOP/java/jar/fndaolj.jar
You can see the full pathname for the java class using

select dbms_java.longname(object_name) object_name, object_type
from dba_objects where owner = 'APPS' and object_type like 'JAVA%'
and status != 'VALID'
order by object_type
/

Then you need to find where this file came from, which is not so easy, however, the following note lists all the jar files I could find that get loaded into Apps database,but the long name will tell you which module the class came from at least.